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[T=sqrt((2 pi m)/(18))],[" 3.A string of...

[T=sqrt((2 pi m)/(18))],[" 3.A string of mass per unit length "mu=6times10^(-3)kg/m" is freed at both ends under the tension "540N" .If the "],[" string is in resonance with consecutive frequencies "420Hz" and "490Hz" .Then find the length of the "],[" string? "]

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